Work with Earthwatch scientists to study how wildlife is responding to regaining habitat from this large-scale reforestation program.

The Serra dos Órgãos mountain range of Rio de Janeiro State creates an amazing landscape of spectacular ridges, valleys, and lowlands, stretching from magnificent mountain summits to mangrove forests on the coast. The Reserva Ecológica de Guapiaçu (REGUA) is nestled into the lowlands of these mountains, and is home to a unique wealth of biodiversity. REGUA is home to at least 60 mammal species, including the elusive Southern Woolly Spider Monkey and the puma.

These breathtaking forested mountains and the unique animals that live within them are under incredible strain. Only 15% of the original forest still stands, and what does remain is very fragmented and disconnected. To combat this decline and to safeguard the area’s biodiversity, Brazil’s government, conservation organisations, and NGOs have invested in large-scale reforestation efforts. While these efforts are urgently needed, they need to be based on strong scientific data to ensure that the way the area is reforested restores both species use and ecosystem services.

On this project, you will investigate small, medium, and large mammals in REGUA, from the common Southern Four-eyed Opossum to the rarely-seen puma. Using both live traps for small to medium animals and camera traps for larger animals, you will collect information about how the mammals of the reserve are responding to reforestation efforts. This project will actively contribute data to the management plan of REGUA, and will produce technical reports for reforestation decision makers. Additionally, you will aid in reforesting the reserve, helping to grow seedlings and planting them within the forest. Your time in the reserve is limited, but the trees you plant will be protected and may stand for decades to come.

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Reserva Ecológica de Guapiaçu, Cachoeiras de Macacu, Rio de Janeiro, Brazil


$2695 | $3295

Includes all accommodation, meals, transfers, insurance and research activities


7 or 14 days (* options for 7 or 14 days; all others are 7 days)


Update October 15 2021: As overseas travel restrictions and covid requirements are not fully finalised, our overseas expeditions are not yet back on sale from Australia. We appreciate that people are as keen as we are to travel and we will facilitate these amazing experiences again as soon as possible. In the meantime, please refer to our Australian experiences.

Activity Level

Very Active

Lead Scientist

Manoel Muanis